diff --git a/utf8proc.spec b/utf8proc.spec
index 89e8a12..9347235 100644
--- a/utf8proc.spec
+++ b/utf8proc.spec
@@ -1,7 +1,7 @@
 Summary: Library for processing UTF-8 encoded Unicode strings
 Name:    utf8proc
 Version: 2.1.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: BSD
 Group:   System Environment/Libraries
 URL:     http://julialang.org/utf8proc/
@@ -37,10 +37,11 @@ strings, unless you want to allocate memory yourself.
 %setup -qn %{name}-%{version}
 
 %build
-make %{?_smp_mflags} CFLAGS="%{optflags}"
+%set_build_flags
+make %{?_smp_mflags}
 
 %check
-make %{?_smp_mflags} CFLAGS="%{optflags}" \
+make %{?_smp_mflags} \
      test/normtest test/graphemetest test/printproperty \
      test/charwidth test/normtest test/graphemetest test/charwidth
 
@@ -60,7 +61,10 @@ rm %{buildroot}%{_libdir}/libutf8proc.a
 %{_libdir}/libutf8proc.so
 
 %changelog
-* Fri Apr 27 2018  Milan Bouchet-Valat <nalimilan@club.fr> - 2.1.1
+* Mon Apr 30 2018  Milan Bouchet-Valat <nalimilan@club.fr> - 2.1.1-2
+- Fix missing build flags (RHBZ #1573115).
+
+* Fri Apr 27 2018  Milan Bouchet-Valat <nalimilan@club.fr> - 2.1.1-1
 - New upstream release.
 
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.1.0-5